Correct Answer - Option 5 : Laser beam welding
Concept:
The following table indicates heat intensity/power density and maximum temperature related with different welding process,
|
Sr. No.
|
Welding Process
|
Heat Flux (W/cm2)
|
Temperature (°C)
|
|
01
|
Gas welding
|
102-103
|
2500 – 3500
|
|
02
|
Shielded metal arc welding
|
104
|
> 6000
|
|
03
|
Gas metal arc welding
|
105
|
8000 – 10000
|
|
04
|
Plasma arc welding
|
106
|
15000 – 30000
|
|
05
|
Electron beam welding
|
107-108
|
20000 – 30000
|
|
06
|
Laser beam welding
|
> 108
|
> 30,000
|
Out of the above options, laser beam welding having the highest heat flux > 108 W/cm2.
Key points:
Note down the values of temperatures also. Maximum temperature also occurs in laser beam welding.
